"As we move through the summer months, our normal daytime highs for the Ottawa-area should be 26, 27 degrees, so saying it could be a bit cooler could still mean daytime highs of about 25 or so, which I'm sure most folks won't have a problem with," said Coulson.

He said that's because of the weather systems that will be moving over the area.

"It looks like overall we're still seeing a bit of a pattern that's going to give us more weather systems, more air masses coming from the west and northwest," he said. "That tends to be somewhat of a cooler direction for us during the summer months and not necessarily tapping into as many air masses coming down from the American deep south, which gives us our hot and humid stretches of weather."

In terms of rainfall, Coulson said that's more difficult to predict in the longer term, but right now their models are showing normal levels of precipitation.